CN201555108U

CN201555108U - Backlight source for miniature LCOS display

Info

Publication number: CN201555108U
Application number: CN2009202379553U
Authority: CN
Inventors: 贾怀昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2010-08-18
Anticipated expiration: 2019-10-26

Abstract

The utility model discloses a backlight source used for a miniature LCOS display, which mainly comprises an LED capable of respectively emitting tricolored light of P, G and B and a flexible PCB board, wherein the LED is electrically connected with the flexible PCB board, the LED capable of respectively emitting tricolored light of P, G and B is laid on a light guide plate, a reflecting film is installed below the light guide plate, and the light guide plate and the reflecting film are respectively installed on a framework. The LED capable of respectively emitting tricolored light of P, G and B and electrically connected with the flexible PCB board is utilized as the backlight source, therefore, the structure of the original backlight source is greatly simplified, the structure is simple and compact, the volume is smaller, the cost is reduced, the light loss of the LED is small, and the higher brightness can be ensured.

Description

A kind of miniature LCOS display backlight source

(1) technical field:

The utility model relates to a kind of miniature LCOS display backlight source, and this backlight is applicable to LCOS one chip display system.

(2) background technology:

LCOS (Liquid Crystal on Silicon) is a kind of reflection type liquid crystal projection new technology that semiconductor is combined with the LCD technology, can be considered a kind of of LCD.Traditional LC D is the polysilicon that is made on the glass substrate, and the material of the substrate of LCOS is a monocrystalline silicon.Power saving, cheap and high-res are the LCOS great advantage.Because LCD adopts the penetration projection way, the light utilization ratio has only about 3%, and resolution is difficult for improving; LCOS then adopts reflective projection, and the light utilization ratio can reach more than 40%, and can utilize CMOS to make, and does not need extra investment, and can be easy to improve resolution with manufacture of semiconductor miniaturization fast.But, need to produce color as backlight with color light source because the LCOS generation is black white image.Present colored LCOS display system mainly is divided into two kinds of one chip and three-chip type systems, and the colored LCOS display system of three-chip type is utilized the colored demonstration of spacing color mixed realizations, needs pixel alignment; The colored LCOS display system of one chip as shown in Figure 1, system comprises LCOS panel D, backlight, light processing lens group C, PBS prism E and camera lens F, described backlight comprises white light source A, is installed in preceding redgreenblue halo B of white light source A and light processing lens group C, three coloured light wheels B fast rotational is backlight with the red, green, blue monochrome that the white light of white light source A is divided in proper order, red, green, blue is monochromatic backlight to be integrated in PBS prism E through the light that sends with LCOS panel D behind the light processing lens group C, handles the back through camera lens F again and shows on screen G.These three primary colors red, green, blue picture synchronization that produces with driver backlight just forms the color separation image.When frequency was enough fast, because the characteristic that human eye vision persists, the observer just can see colored projected picture.The one chip light engine takes up room relatively little, only needs a slice panel, and system architecture is fairly simple, therefore tool competitive advantage on cost.Yet white light is through after the polarization, and brightness obviously reduces, and energy only remains 1/3.In addition since the LCOS panel will be under red, blue, green picture switches fast resultant image, the requirement of counter plate reaction speed is higher, and its complex structure, volume is big, manufacturing cost is high.

(3) utility model content:

In order to overcome the deficiencies in the prior art, the utility model provide a kind of simple and compact for structure, cost is low, brightness is high, volume is little, swift LCOS backlight.

The utility model is to realize by following technical scheme: a kind of miniature LCOS display backlight source, and it mainly comprises the LED and the soft pcb board that send R, G, B three coloured light respectively, LED is electrically connected with soft pcb board.

An above-mentioned described LED who sends R, G, B three coloured light respectively is laid on the LGP, and reflective membrane is installed below LGP, and LGP, reflective membrane are installed on the framework.

Above-mentioned described soft PCB version sticks on the LGP by Double-face gummed paper.

Above-mentioned described under can laying successively on the LGP diffusion barrier and bright enhancement film, fix by gummed paper then.

Above-mentioned described framework both sides are provided with the extension arm, form groove between the two extension arms, and described LCOS display can be installed in the groove.

Above-mentioned described soft pcb board is provided with pin.

The utility model compared with prior art, following advantage is arranged: 1) utilize a LED who sends R, G, B three coloured light respectively to be electrically connected as backlight with soft pcb board, simplified the structure of original backlight greatly, simple and compact for structure, volume is less, reduce cost, and used the light loss consumption of LED little, can ensure higher brightness; 2) LED who sends R, G, B three coloured light respectively is laid on the LGP, reflective membrane is installed below LGP, LGP, reflective membrane are installed on the framework, diffusion barrier, following bright enhancement film under can laying successively on the LGP, last bright enhancement film, fix by gummed paper then, can increase the brightness of LED-backlit, and make color backlight more even.3) the framework both sides are provided with the extension arm, form groove between the two extension arms, and described LCOS display can be installed in the groove, installs and uses very convenient; 4) soft pcb board is provided with pin, connect simple and convenient, by with LCOS display driven in synchronism LED, reaction speed is fast, image effect is good.

(4) description of drawings:

Below in conjunction with accompanying drawing the utility model is done detailed explanation:

Fig. 1 is the structural representation of the colored LCOS display system of one chip in the prior art;

Fig. 2 is a front view of the present utility model;

Fig. 3 is the vertical view of Fig. 2;

Fig. 4 is a part explosive view of the present utility model;

Fig. 5 is the circuit theory diagrams of three-color LED of the present utility model.

(5) specific embodiment:

As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the utility model comprises framework 1, reflective membrane 6, LGP 7, LED 2 who sends R, G, B three coloured light respectively, soft pcb board 3, diffusion barrier 5, bright enhancement film 4 and gummed paper 7 down, LED2 is electrically connected with soft pcb board 3, a LED2 who sends R, G, B three coloured light respectively is laid on the LGP 7, reflective membrane 6 is installed below LGP 7, and LGP 7, reflective membrane 6 are installed on the framework 1.Described soft pcb board 3 sticks on the LGP 7 by Double-face gummed paper 11.Diffusion barrier 5 and bright enhancement film 4 under can laying successively on the LGP 7, fixing by gummed paper 10 then.Described framework 1 both sides are provided with to hang between arm 8, the two extension arms 8 and form groove 9, and described LCOS display can be installed in the groove 9.Soft pcb board 3 is provided with pin 12.

A LED who sends R, G, B three coloured light respectively is electrically connected as backlight with soft pcb board, has simplified the structure of original backlight greatly, and simple and compact for structure, volume is less, has reduced cost, and uses the light loss consumption of LED little, can ensure higher brightness.There are 3 luminescence chips a LED lamp the inside, and these 3 luminescence chips send R, G, B three coloured light.

The foregoing description is a better embodiment of the present utility model; but embodiment of the present utility model is not limited thereto; other are any not to deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitute, combination, simplify; be the substitute mode of equivalence, be included within the protection domain of the present utility model.

Claims

1. miniature LCOS display backlight source, it is characterized in that: it mainly comprises the LED and the soft pcb board that send R, G, B three coloured light respectively, and LED is electrically connected with soft pcb board.

2. a kind of miniature LCOS display backlight according to claim 1 source is characterized in that: a LED who sends R, G, B three coloured light respectively is laid on the LGP, and reflective membrane is installed below LGP, and LGP, reflective membrane are installed on the framework.

3. a kind of miniature LCOS display backlight according to claim 2 source, it is characterized in that: described soft pcb board sticks on the LGP by Double-face gummed paper.

4. a kind of miniature LCOS display backlight according to claim 3 source is characterized in that: diffusion barrier and bright enhancement film under can laying successively on the LGP, fix by gummed paper then.

5. according to claim 2 or 3 described a kind of miniature LCOS display backlight sources, it is characterized in that: described framework both sides are provided with the extension arm, form groove between the two extension arms, and described LCOS display can be installed in the groove.

6. according to claim 2 or 3 described a kind of miniature LCOS display backlight sources, it is characterized in that: soft pcb board is provided with pin.